Alert archive / Iowa / Mesoscale Discussions in 2016

Mesoscale Discussion 1182

July 7, 201614 counties in Iowa; 4 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2016, 3:52 AM CDT for 14 counties in Iowa; 4 counties in Minnesota. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2016, 3:52 AM CDT (08:52 UTC)
Expired: Jul 7, 2016, 5:15 AM CDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Chickasaw County, IA, Fayette County, IA, Howard County, IA, Jasper County, IA, Mahaska County, IA, Marion County, IA, Poweshiek County, IA, Tama County, IA, Warren County, IA, Winneshiek County, IA, Fillmore County, MN, Houston County, MN, Olmsted County, MN, Winona County, MN

The radar

The Des Moines radar (KDMX), 153 km from the middle of the area, began a volume at 08:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 8.9 hours before the alert went out and 210 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1025 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 882 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 7:38 PM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 7 more	6 hr
Jul 7, 12:30 AM CDT	Mesoscale Discussion	SPC	Audubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 51 more	90 min
Jul 7, 12:47 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 37 more	4 hr
Jul 7, 1:22 AM CDT	Mesoscale Discussion	SPC	Decatur, Fremont, Page, Ringgold, Taylor, Wayne	83 min
Jul 7, 1:37 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 11 more	6 hr
Jul 7, 4:27 AM CDT	Mesoscale Discussion	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Lucas and 6 more	93 min
Jul 7, 5:26 AM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Davis, Decatur, Lucas, Monroe and 2 more	2 hr
Jul 7, 6:01 AM CDT	Severe Thunderstorm Watch	SPC	Des Moines, Henry, Jefferson, Lee, Van Buren	6 hr
Jul 7, 8:10 AM CDT	Mesoscale Discussion	SPC	Des Moines, Lee	95 min
Jul 7, 1:50 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 41 more	115 min
Jul 7, 3:54 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 37 more	5 hr
Jul 7, 6:30 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 39 more	2 hr
Jul 7, 3:10 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 9 more	2 hr

Nearby

Mesoscale Discussions in Iowa, 2016 Mesoscale Discussions in Minnesota, 2016 Every mesoscale discussion in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.